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ide: add "nodma|noflush|noprobe|nowerr=" parameters 

* Add "nodma|noflush|noprobe|nowerr=" parameters.

* Obsolete "hdx=noprobe|none|nowerr|nodma|noflush" kernel parameters.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2008-04-27 15:38:30 +02:00
parent 207daeaabb
commit 6e87543a94
2 changed files with 88 additions and 17 deletions
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26
Documentation/ide/ide.txt
View File

@ -99,10 +99,10 @@ with hd.c but not with ide.c), then an command line option may be specified
for each drive for which you'd like the drive to skip the hardware
probe/identification sequence. For example:
hdb=noprobe
ide_core.noprobe=0.1
or
hdc=768,16,32
hdc=noprobe
ide_core.noprobe=1.0
Note that when only one IDE device is attached to an interface, it should be
jumpered as "single" or "master", *not* "slave". Many folks have had
@ -174,9 +174,7 @@ to /etc/modprobe.conf.
When ide.c is used as a module, you can pass command line parameters to the
driver using the "options=" keyword to insmod, while replacing any ',' with
';'. For example:
insmod ide.o options="hda=nodma hdb=nodma"
';'.
================================================================================
@ -186,18 +184,10 @@ Summary of ide driver parameters for kernel command line
"hdx=" is recognized for all "x" from "a" to "u", such as "hdc".
"hdx=noprobe" : drive may be present, but do not probe for it
"hdx=none" : drive is NOT present, ignore cmos and do not probe
"hdx=nowerr" : ignore the WRERR_STAT bit on this drive
"hdx=cdrom" : drive is present, and is a cdrom drive
"hdx=cyl,head,sect" : disk drive is present, with specified geometry
"hdx=nodma" : disallow DMA
"ide=doubler" : probe/support IDE doublers on Amiga
There may be more options than shown -- use the source, Luke!
@ -230,6 +220,16 @@ a case please report it as a bug instead) use "ignore_cable" kernel parameter:
* "ignore_cable=[interface_number]" module parameter (for ide_core module)
if IDE is compiled as module
Other kernel parameters for ide_core are:
* "nodma=[interface_number.device_number]" to disallow DMA for a device
* "noflush=[interface_number.device_number]" to disable flush requests
* "noprobe=[interface_number.device_number]" to skip probing
* "nowerr=[interface_number.device_number]" to ignore the WRERR_STAT bit
================================================================================
Some Terminology

79
drivers/ide/ide.c
View File

@ -915,10 +915,10 @@ static int __init ide_setup(char *s)
case -1: /* "none" */
case -2: /* "noprobe" */
drive->noprobe = 1;
goto done;
goto obsolete_option;
case -3: /* "nowerr" */
drive->bad_wstat = BAD_R_STAT;
goto done;
goto obsolete_option;
case -4: /* "cdrom" */
drive->present = 1;
drive->media = ide_cdrom;
@ -927,10 +927,10 @@ static int __init ide_setup(char *s)
goto done;
case -5: /* nodma */
drive->nodma = 1;
goto done;
goto obsolete_option;
case -11: /* noflush */
drive->noflush = 1;
goto done;
goto obsolete_option;
case -12: /* "remap" */
drive->remap_0_to_1 = 1;
goto obsolete_option;
@ -1125,6 +1125,72 @@ EXPORT_SYMBOL_GPL(ide_pci_clk);
module_param_named(pci_clock, ide_pci_clk, int, 0);
MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)");
static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp)
{
int a, b, i, j = 1;
unsigned int *dev_param_mask = (unsigned int *)kp->arg;
if (sscanf(s, "%d.%d:%d", &a, &b, &j) != 3 &&
sscanf(s, "%d.%d", &a, &b) != 2)
return -EINVAL;
i = a * MAX_DRIVES + b;
if (i >= MAX_HWIFS * MAX_DRIVES || j < 0 || j > 1)
return -EINVAL;
if (j)
*dev_param_mask |= (1 << i);
else
*dev_param_mask &= (1 << i);
return 0;
}
static unsigned int ide_nodma;
module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0);
MODULE_PARM_DESC(nodma, "disallow DMA for a device");
static unsigned int ide_noflush;
module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0);
MODULE_PARM_DESC(noflush, "disable flush requests for a device");
static unsigned int ide_noprobe;
module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0);
MODULE_PARM_DESC(noprobe, "skip probing for a device");
static unsigned int ide_nowerr;
module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0);
MODULE_PARM_DESC(nowerr, "ignore the WRERR_STAT bit for a device");
static void ide_dev_apply_params(ide_drive_t *drive)
{
int i = drive->hwif->index * MAX_DRIVES + drive->select.b.unit;
if (ide_nodma & (1 << i)) {
printk(KERN_INFO "ide: disallowing DMA for %s\n", drive->name);
drive->nodma = 1;
}
if (ide_noflush & (1 << i)) {
printk(KERN_INFO "ide: disabling flush requests for %s\n",
drive->name);
drive->noflush = 1;
}
if (ide_noprobe & (1 << i)) {
printk(KERN_INFO "ide: skipping probe for %s\n", drive->name);
drive->noprobe = 1;
}
if (ide_nowerr & (1 << i)) {
printk(KERN_INFO "ide: ignoring the WRERR_STAT bit for %s\n",
drive->name);
drive->bad_wstat = BAD_R_STAT;
}
}
static unsigned int ide_ignore_cable;
static int ide_set_ignore_cable(const char *s, struct kernel_param *kp)
@ -1150,11 +1216,16 @@ MODULE_PARM_DESC(ignore_cable, "ignore cable detection");
void ide_port_apply_params(ide_hwif_t *hwif)
{
int i;
if (ide_ignore_cable & (1 << hwif->index)) {
printk(KERN_INFO "ide: ignoring cable detection for %s\n",
hwif->name);
hwif->cbl = ATA_CBL_PATA40_SHORT;
}
for (i = 0; i < MAX_DRIVES; i++)
ide_dev_apply_params(&hwif->drives[i]);
}
/*